DE1937122B2 - Tubular heat transfer device - Google Patents

Description

The invention relates to a heat transfer device with a tubular housing part and a tubular insert contained therein, the having radially inwardly extending plates which lie on top of each other and which are in direct contact with each other Close to the housing part connect arcuate areas, each of which is a pair of plates includes a flow path for a secondary fluid and the adjacent pairs of plates each the side walls of an axially to the tubular insert, approximately triangular in cross-section Form flow channel for a primary fluid.

A heat transfer device designed in this way is known, for example, from US Pat. No. 1,920,059 Mi ·, this device, however, can not be too intimate contact between the secondary fluid and reach the primary fluid, as the surface in contact with both fluids through which the heat is transferred takes place is relatively low.

The effect of this device is therefore not yet

optimal. .

Heat transfer devices of the type described at the beginning Ar- "have application in many fields. One possibility is that such, -v-ndntung switched on in a line will, the £ ..- W; hiic fluid from the cooler a motor vehicle to the water pump promotes, and the engine coolant is used to the hydraulic Cool fluid from the automatic transmission. There are other possible uses in the cooling of engine lubricating oil, hydraulic fluids or power steering fluid.

A typical oil cooler for automatic transmissions is generally found in a side or boom the tank of the automobile radiator. It essentially has a channel for the oil that flows from the EiniaC flows to the outlet, and the oil is thus carried by the coolant in the side or bottom tank of the radiator: chilled. The obvious disadvantage of such an arrangement is the additional cost, di < when installing the unit in the cooler who caused the, as well as the additional costs that de Enlargement of the cooler tank to accommodate the oil cooler.

The present invention has set itself the task of an economically producible and increased To create effectiveness exhibiting heat transfer device. Such a device is said to be in Connection with motor vehicle radiator hoses nor-> painter size can be used and beyond that no changes or enlargements Make automotive radiator tanks necessary.

This object is achieved by a heat transfer device mentioned at the beginning, which thereby is characterized in that the tubular insert with the radially extending plates consists of a folded, indented band and the indentations Form channels between the plates lying on top of one another in pairs, which act as a flow path for the Secondary fluid are used and which, starting from Eintriuskc.mmern molded into the plates, have a zigzag shape Running over the radial extent of the plates and crossing each other to also integrated into the plates Exit chambers lead in the axial direction of the tubular insert are arranged at a distance from the inlet chambers, and that inlet and exit chambers are in communication with the outer periphery of the tubular insert.

Heat transfer devices mil rohrförmi like housing part and tubular therein contained Einsat / are, as mentioned at the beginning, not new in themselves, however, the construction of the present invention is seen as a substantial improvement for several reasons of the existing constructions.

In a heat transfer device in which a fluid is in heat exchange relationship with circulates around another, the more intimate the contact between, the greater the effectiveness of the unit the fluids. To the same extent as further touched by both fluids Increasing the surface area increases the effectiveness of the unit. Through the zigzag over the radial Expansion of the plates running channels for the secondary fluid is the flow of both total area touched is considerably enlarged, resulting in a considerably improved heat exchange Effectiveness arises.

In addition, the heat transfer device according to the invention Produce economically, since the tubular insert from a single flat Tape is made, which is folded into the desired shape and attached to the tubular housing part An essential feature of the invention is that the channels for the secondary fluid are arranged in the band Depressions are formed. Such indentations or ribs embossed in a housing are known per se (US Pat. No. 1,790,036). In the known embodiment, the embossed However, depressions or ribs are only used to enlarge the effective surface and do not form any channels for a secondary fluid as proposed according to the invention. The known embodiment In particular, it also does not show the special folding of the tape proposed according to the invention which the channels for the secondary fluid are formed.

From DT-PS 170 984 it is known to form channels through recesses arranged in plates between plates lying on top of one another in pairs. This known device is however not excluded ^fi tubular forms and 5 does not have a tubular insert, in which the channels for the primary and secondary fluid are located. Thus, the invention is not anticipated by this publication either.

A particular problem arising from the use of modern automatic transmission oil coolers is the need to manufacture a number of coolers of different sizes and shapes for motor vehicles of the same basic design. For example, in vehicles that are equipped with Normalgeiriebei, changes to the expansion tank ter and the connections and a different Kuh ler than in vehicles that are equipped with automatic transmissions, since the hydraulic fluid from the automatic transmission must be cooled. The present invention overcomes this problem by allowing automobile manufacturers to use a full-size radiator and a standard set of connectors on expansion tanks regardless of the type of transmission with which the vehicle is equipped. If the vehicle is equipped with an automatic transmission, the only change that must be made for cooling the Ubertragungsflüssigkeit, that the inventive device is placed in the Kühlerschlaiichleitung back passes the cooled fluid from d ^p rr · cooler to the water pump, and suitable connections are attached between this heat transfer device and the transmission.

According to a preferred embodiment of the heat transfer device according to the invention stand the inlet chambers with a distribution chamber and the outlet chambers with a collecting chamber in connection and are distribution and collection chambers each of an annular collar around the tubular housing part, in an inlet or outlet opening is arranged. limited to the outside.

The distribution and collection chambers are preferably in the immediate vicinity of the ends of the tubular housing part arranged and aligned in the radial direction in each case to the inlet and outlet chambers.

However, the invention is also characterized by an embodiment in which the distribution and Collection chamber arranged in close proximity to one another between the ends of the tubular housing part are and in which each arcuate area of the tubular insert is in Has longitudinal channel extending at each end in a transverse channel between a pair adjacent inlet and outlet chambers ends, and each longitudinal channel has a distribution chamber or connects collecting chamber to the inlet or outlet chambers.

Another embodiment is characterized in that the inlet chambers in communication with a distribution chamber and the outlet chambers are in communication with a collection chamber and that the Distribution and collection chamber is each delimited by an annular channel in the tubular Insert is designed, extends around it and has inlet and outlet openings, which are each aligned radially to the distribution and collection chamber.

The distribution chamber is preferably formed by a first semicircular collar in the tubular Housing formed which is in communication with about one half of the inlet chambers and flow channels, the collecting chamber is formed by a second semicircular collar at the same end of the tubular Housing, but rotated by 180 °, formed the

with the rest of the inlet chambers and flow channels is in connection, the inlet and outlet openings being arranged in the first and second annular collar is, and uses a raised circular ring comb, which is in communication with the outlet chambers, the first half of the flow channels with the / widen Half connected.

In the drawings, the preferred exemplary embodiments the inventions show is

F i g. 1 is a perspective view of the assembled Heat transfer device with parts broken away,

F i g. Figure 2 is a top plan view of the tape from which the tubular insert is formed;

F i g. 3 is a partial perspective view of the FIG. 2 manufactured tubular insert.

F i g. 4 is a perspective view of a second embodiment of the heat transfer device.

F i g. 5 is a perspective view of a third embodiment of the heat transfer device;

F i g. 6 is a plan view of the tape from which the FIG. 5 shown tubular insert is formed,

F i g. 7 is a partial perspective view of the FIG. 6 manufactured tubular insert,

F i g. 8 is a perspective view of a fourth Embodiment of the heat transfer device,

F i g. 9 is a plan view of the tape from which the FIG. 8 manufactured tubular insert shown will and

Fig. 10 is a perspective view of the after F i g. 9 manufactured tubular insert.

Referring to FIG. 1 has a tubular Housing part 10 has two raised rings 11 and 12, which serve as a distribution or collection chamber and which surround themselves the circumference of the tubular housing part 10 extend and fluid on the inner circumference 13 of the tubular Housing part 10 can run along. A circular surface 15 is provided on the ring 11 and forms an opening 16. The surface 15 and the opening 16 are for receiving a connecting piece 17 certainly. A similar surface 18 is provided on the ring 12 and defines an opening 20 which is a fitting 21 can accommodate. Extensions 22 and 23 are at both ends of the tubular housing part 10 is provided to create a leak-free seal when the tubular housing part is attached to suitable Piping is connected.

As best seen in Fig. 2, a tubular insert 25 is made from a band 26. The belt 26 has a plurality of vertically extending adjacent sections A, B and C. two sections A and B being separated from the next two sections A and B by the narrower section C. The vertical section A has two depressions 27 and 28. which run parallel to the horizontal axis 30 of the belt 26. The vertical section A also has a large number of depressions 31 which run at an angle to the horizontal axis 30 of the belt 26. The topmost of these angular depressions 31 is shown connected to the horizontal depression 27. The lowermost of the angular depressions 31 is shown connected to the horizontal depression 28. The horizontal recess 27 extends from a left edge 32 of the vertical section A to a right edge 33 of the section A, which also forms the left edge of the section β, but ends shortly before it. \ benso the horizontal depression 28 extends from the left edge 32 of section A to almost the right edge 33 of section A; however, it ends shortly before that.

Section B is similar to section A in that it has two horizontal recesses 35 and 36 and a plurality of angular recesses 37. The main difference between sections A and B is that the horizontal run 35 extends from a right edge 38 of the

ίο section ß to the left edge 33 extends, but ends shortly before. The horizontal recess 36 extends from the right edge 38 of the section B to its left edge 33. However, ends shortly before it.

After it has been deformed, the band 26 is then folded, as best shown in FIG. 3 can be seen, so that all vertical sections A and B rest against one another and section C separates adjacent folds. When folded in this way, the horizontal depressions 28 and 36 form a fluid inlet chamber hI which can receive the fluid which is distributed around the inner circumference 13 of the tubular housing part 10 by the raised ring 11. The horizontal depressions 27 and 35, in the folded state, form a fluid outlet chamber 42 which can direct fluid to the raised ring 12. As in Fig. 3, the angled recesses 31 in section A cooperate with the angled recesses 37 in section B to form a fluid channel 43 extending between inlet chamber 41 and outlet chamber 42. The fluid inlet chamber 41, the fluid channel 43 and the fluid outlet chamber 42 have been illustrated and described for a single concertina fold 45. The construction is essentially the same for each fold of the tubular insert.

The folded band is then shaped into a circular shape and into the tubular housing part 10 used in such a way that the inlet chambers 41 with the raised ring 11 and the outlet chambers 42 with the increased ring 12 coincide axially in their position.

The tubular insert 25 can then expand radially until its entire outer circumference, i. H. the vertical Sections C, is in contact with the inner circumference 13 of the tubular housing part

The tubular insert 25 is then on each side edge with the inner circumference 13 of the tubular Housing part 10 connected. In addition, the tubular insert is fitted along each radial fold 45

so tied. The assembly thus creates a leakproof one Connection between the ends of the tubular insert and the tubular housing and between adjacent sections of the tubular insert.

The resulting tubular insert provides a plurality of fluid channels 46. the one have a triangular cross-section when viewed from one end of the tubular member extend over the length of the baffle part, and each which has a central axis parallel to the zen tral axis of the tubular housing part 10 ver runs. A circular fluid channel 47 is formed by tips 48 of the triangular channels 46 and is to the central axis of the tubular part

'• 5 concentric.

The operation of the in F i g. 1 shown before direction is essentially as follows: The transfer transmission device is ge in a coolant line

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switches, e.g. B. the line, the cooled fluid from the radiator to the water pump of a motor vehicle equipped with an automatic transmission promotes.

A fluid line, not shown, is connected to the connector 17 to hydraulic To direct fluid for cooling from the transmission to the heat transfer device. Another Fluid line is connected to the connector 21 and is used to cool the Return fluid from the heat transfer device to the transmission.

During operation of the motor vehicle, a coolant is conveyed from the radiator of the vehicle of the triangular channels 46 and the central channel 47 slides axially through the transmission device. Fluid from the transmission enters the heat transfer device through port 16 and is due to the distribution chamber around the inner circumference 13 of the tubular housing member 10 is distributed around and into each of the fluid inlet chambers 41 headed. Since the fluid is under pressure, that introduced into each inlet chamber 41 becomes Fluid causes fluid to flow through the corresponding fluid channel 43 in each fold 45. »5 After flowing through the fluid channel! 43 the fluid enters the fluid outlet chambers 42 passed, which is in communication with the channel 43 and via the collecting chamber formed by the ring 12 led to opening 20. The fluid then exits the heat transfer device and is returned to the automatic transmission.

It is readily apparent that both as regards the intimacy of contact between the fluids as well as a considerable increase in terms of the total area contacted by the two fluids or enlargement compared to known annular heat transfer devices is achieved, by guiding the coolant around and along each fold in the baffle part, while the fluid to be cooled circulates in the folds of the tubular insert. The result is a heat transfer device with much higher efficiency.

If so desired. the fluid to be cooled in this example the fluid of the automatic Passing gear more than once through the tubular insert, so this can be by the in F i g. 4-4, called "double pass" heat exchangers can accomplish. The main difference between this embodiment and the one in F i g. 1 shown embodiment lies in the formation of the outer tubular housing part 50. The outer tubular housing part 50 has an essentially semicircular collar 51. the one has a flat surface 52 which forms an opening 53 for receiving a connecting piece 55. A second in the The substantially semicircular collar 56 is at the same end of the tubular housing part 50 like the first semicircular collar 51, but offset by 180 °. It has a flat surface 57. which has an opening (not shown) for receiving a connection piece 58. On the other At the end of the tubular housing part 50, a raised circular annular chamber 60 is provided, which has a plurality of fluid chambers in the upper half of the tubular insert 25 with a plurality of voi Can connect fluid chambers in the lower half of the tubular insert 25 The "double pass" device according to FIG. 4 used tubular insert, which is used in the to before described single-pass device according to FIG. 1 is used.

The operation of the »double pass device differs from that of the single pass gear device as follows. The fluid comes from the automatic transmission through the port piece 55 in the heat transfer device gelei tel. The fluid becomes in the fluid inlet chambers 41 distributed in the upper half of the tubular insert 25. It then flows through the in dei upper half of the tubular insert located fluid channels 43 that the fluid chambers 41 and the corresponding chambers 42 in the upper half of the tubular insert 25. At this point the fluid with the fluid chambers 42 in the lower half of the tubular insert at the same end of the tubular housing part in connection, wherein these chambers now function as fluid inlet chambers fulfill. The fluid to be cooled then makes its second pass through the tubular insert 25 in a direction opposite to the direction of the first pass is. this time through fluid channels located in the lower half of the tubular insert 25 43 flows. The fluid is then directed into the fluid chambers 41, which in the lower half of the tubular insert 25 is arranged at the same end of the heat exchanger where the fluid enters. These chambers now function as fluid outlet chambers. The fluid is then through the semicircular collar 56 to the fitting 58 and flows back to the automatic transmission.

A third embodiment is shown in FIG. 5 shown. It is of the single pass type but allows the Relocation of the inlet and outlet of the device towards the center of a tubular suspension element 65. Two elevated distribution and collection chambers 66 and 67 are on the tubular housing part 65 towards the middle provided for. Each distribution or collection chamber has an opening 68 and 69, respectively, for receiving a Connection piece 71 or 72 is determined. The tubular insert 73 basically has the same design like the previously described insert 25. However, as shown in FIG. 6 is the vertical section C with two horizontal depressions 75 and 76 and two narrower vertical depressions 77 and 78, each vertical recess communicating with a horizontal recess. When the tubular insert 73 is now folded, brought into a circular shape and into the tubular Housing part 65 is used, the vertical recesses 78 and 77 are in axial alignment with the distribution or collection chamber 66 and 67. The tubular insert 73 forms, as in FIG. 7 shown is, an inlet chamber 80 and an outlet chamber 81. those at opposite ends of the tubular Insert are arranged, and a fluid channel 82 connecting the chambers.

The operation of this embodiment of the heat transfer device is essentially the

409 551/188

same as that of the embodiment according to FIG Fluid enters the chamber 66 through the opening 68 and flows through the vertical depressions 78 passed to the inlet chambers 80. The fluid is then passed through the fluid channels 82 out and over the outlet chambers 81, the vertical recess 77 and the collecting chamber 67 to the opening 69, as shown in FIG. 7 can be seen.

A fourth embodiment is shown in FIG. 8 shown. The basic construction of the previously illustrated heat transfer devices is retained, but the tubular housing part 85 is of a simpler construction and has no raised annular chambers. The tubular housing part 85 is provided with an opening 86 and an opening 87, each opening being able to accommodate a suitable connecting piece 88 and 89, respectively. Like F i g. 9 shows, the tubular insert 91 is formed essentially like the other previously described and illustrated inserts, with the exception that two horizontal recesses 92 and 93 are provided in the vertical section C which extend parallel to the horizontal axis of the insert. The recess 92 has the same width as a horizontal recess 94 in section B and a recess 95 in section A and connects both mitein other. In the same way, the recess 93 connects a recess% in section B and a recess 97 in section A. The horizontal recesses 96 and 97 together form a fluid inlet chamber, as shown in FIG. 10, and the recesses 94 and 95 form one Fluid outlet chamber. The horizontal depressions 93 formed in section C serve to connect all of the fluid inlet chambers to one another and to the opening 86. The horizontal depressions 92 in section C serve to connect all of the flow medium outlet chambers to one another and to the opening 87 in the tubular housing part 85.

It can thus be seen that the present invention advantageously provides a heat transfer device creates, in which a fluid in heat exhaust

ao exchange relationship with another fluid in Is circulated, which is used to cool the hydraulic fluid of an automatic transmission a motor vehicle can be used.

For this purpose 2 sheets of drawings

Claims (6)

Patent claims: 1. Heat transfer device with a tubular housing part and a tubular insert contained therein, which has radially inwardly extending plates, which lie on top of one another in pairs and which are connected to arcuate areas in the immediate vicinity of the housing part, each of which a pair of plates includes a flow path for a secondary fluid and the mutually adjacent pairs of plates each form the side walls of an approximately triangular cross section for a primary fluid running axially to the tubular insert, characterized in that the tubular insert (25, 73, 91) with the radially extending plates (A , B) from a folded. Depressions (31, 37) having band (26) and the depressions ( 31.37) form channels (43, 82) between the plates (A, B) lying one on top of the other in pairs, which serve as flow paths for the secondary fluid and which. Starting from the inlet chambers (41, 80) formed in the plates (A. B) , zig-zagging over the radial extension of the plates and crossing each other lead to outlet chambers (42, 81) also formed in the plates, which in the axial direction of the tubular Insert are arranged at a distance from the Eintriitskamniern, and that inlet and outlet chambers are connected to the outer circumference of the tubular insert / es. 2. Heat transfer device according to claim 1, characterized in that the inlet chambers (41) with a distribution chamber (11) and the Outlet chambers (42) are in communication with a collecting chamber (12) and distributing and collecting chamber in each case by an annular collar around the tubular housing part, in which an inlet resp. Outlet opening (16, 20) is arranged, are limited to the outside. 3. Heat transfer device according to claim 2, characterized in that the distribution and collecting chamber arranged in close proximity to the ends of the tubular housing part (50) and are aligned in the radial direction with the inlet and outlet chambers. 4. Heat transfer device according to claim 2, characterized in that the distribution and collection chamber (66, 67) in close proximity to each other between the ends of the tubular Housing part (65) are arranged and that each arcuate region of the tubular Insert (73) has a longitudinally extending channel (77, 78) on each End in a transverse channel (75) between a pair of adjacent entry or exit chambers (80, 81) ends, and that each longitudinal channel (77, 78) has a distribution chamber or collecting chamber with the Connects entry or exit chambers. 5. Heat transfer device according to claim 1, characterized in that the inlet chambers in connection with a distribution canister and the outlet chambers are in communication with a collection chamber and that the distribution and Collection chamber is bounded by an annular channel (92, 93) in the tubular Insert (91) is formed, extends around this and inlet and outlet openings (86 87), which are each aligned rad.al to the Verte.l- and collection chamber 6 heat transfer device according to claim 1 characterized in that the distribution chamber'von a first semicircular collar (51) is formed in the tubular housing (50) is connected to about half of the entry chambers (41) and flow channels stands that the collection chamber of a second semicircular collar (56) on the same End of the tubular housing, but rotated 180 °, is formed with the rest of the Entrance chambers (41) and flow channels in connection, wherein in the first and second annular collar the inlet and outlet opening (53, 58) is arranged. and that a raised circular Annular chamber (60) which communicates with the outlet chambers, the first half of the flow channels with the second half in connection set / t.